There is no how to determine myocardial ischemia within a few minutes, myocardial ischemia may not have any symptoms, can also show symptoms of angina pectoris, if the blood flow to the myocardium is completely interrupted, but also the symptoms of myocardial infarction, and even sudden death may occur, of which only angina pectoris and myocardial infarction, it is possible to quickly determine within a few minutes by symptoms. Myocardial ischemia is a pathophysiological state of heart disease, mostly due to coronary artery atherosclerosis, coronary artery spasm, etc. Some patients have no symptoms when myocardial ischemia occurs, and it is difficult to judge within a few minutes. Some patients with myocardial ischemia when angina pectoris or myocardial infarction occurs, there can be symptoms such as pain in the anterior region of the heart, it can be judged within a few minutes. Patients with angina pectoris and myocardial infarction will have pressure-like pain in the retrosternal and precordial areas, which can radiate to the left shoulder. Usually, the duration of pain in angina pectoris is usually less than 15 minutes, while the pain in myocardial infarction can last for 30 minutes or more. If the above symptoms occur, you should call 120 as soon as possible to avoid delay.